The Herbal Essences gels seem to be pretty popular around here. Personally, I'm a big fan of the Herbal Essences Set Me Up gel. It has a good bit of hold, so it should work well in the humidity.

For I know that my Redeemer lives,
And He shall stand at last on the earth;
And after my skin is destroyed, this I know,
That in my flesh I shall see God,
Whom I shall see for myself,
And my eyes shall behold, and not another.
How my heart yearns within me!
(Job 19:25-27)